package Thread;

class Counter {

    public int count = 0;

     public void add() {
         synchronized (this) {
             count++;
         }
     }

}

public class ThreadDem9 {

    public static void main(String[] args) throws InterruptedException {
        Counter counter = new Counter();
        Thread t1 = new Thread(()->{
            for (int i = 0; i < 50000; i++) {
                counter.add();
            }
        });
        Thread t2 = new Thread(()->{
            for (int i = 0; i < 50000; i++) {
                counter.add();
            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println("count = "+counter.count);
    }

}
